JPH0253491B2 - - Google Patents
Info
- Publication number
- JPH0253491B2 JPH0253491B2 JP6014681A JP6014681A JPH0253491B2 JP H0253491 B2 JPH0253491 B2 JP H0253491B2 JP 6014681 A JP6014681 A JP 6014681A JP 6014681 A JP6014681 A JP 6014681A JP H0253491 B2 JPH0253491 B2 JP H0253491B2
- Authority
- JP
- Japan
- Prior art keywords
- steel annular
- steel
- quenching
- injected
- diameter side
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 229910000831 Steel Inorganic materials 0.000 claims description 33
- 239000010959 steel Substances 0.000 claims description 33
- 238000010791 quenching Methods 0.000 claims description 18
- 230000000171 quenching effect Effects 0.000 claims description 17
- 238000005192 partition Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 239000000110 cooling liquid Substances 0.000 claims description 6
- 229910000746 Structural steel Inorganic materials 0.000 claims description 5
- 239000000463 material Substances 0.000 description 9
- 230000002093 peripheral effect Effects 0.000 description 6
- 238000005255 carburizing Methods 0.000 description 5
- 239000000498 cooling water Substances 0.000 description 4
- 102220259718 rs34120878 Human genes 0.000 description 4
- 238000007670 refining Methods 0.000 description 3
- 239000012809 cooling fluid Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 102200082816 rs34868397 Human genes 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000012447 hatching Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 102200003959 rs11556986 Human genes 0.000 description 1
- 102200081478 rs121908458 Human genes 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/40—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rings; for bearing races
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Description
【発明の詳細な説明】
この発明は、鋼製環状部品の部分焼入れ方法、
詳しくは、フオークリフトのマストローラ兼用軸
受の外輪の如く、マストレールに転接する外周面
を例えばHRC30程度の調質かたさとほぼ同等のか
たさに保持し、転動体が転走する内周面を例えば
HRC60程度の適正かたさに焼入れされる鋼製環状
部品、或は搬送装置に使用されるローラ兼用軸受
の外輪等、内外径面のかたさを異ならせる必要の
ある鋼製環状部品の焼入れ方法に関する。[Detailed Description of the Invention] This invention provides a method for partially quenching a steel annular part,
Specifically, the outer ring of a forklift mast roller bearing, which contacts the mast rail, is maintained at a hardness that is approximately equivalent to H RC 30, and the inner circumferential surface on which the rolling elements roll. For example
Regarding the hardening method for steel annular parts that need to be hardened to an appropriate hardness of about H RC 60, or steel annular parts that need to have different hardness on their inner and outer diameter surfaces, such as the outer ring of a roller bearing used in a conveyor device. .
例えばフオークリフトのマストローラ兼用軸受
において、その外輪が転走するマストレールは、
S45C等の一般機械構造用鋼材が使用されるため
に、外輪全体のかたさを通常のころがり軸受用外
輪の如く、HRC60程度に焼入れしておいた場合、
レール面が極度に摩耗して耐久性を著しく低下さ
せ、その摩耗粉が飛散して作業環境を著るしく悪
化させるという不都合があつた。またこのような
外輪は、全体が高硬度のため、衝撃荷重、大荷重
が負荷されたときに破壊しやすく、その破損は材
料にじん性がないため多数の破片となつて飛散
し、作業者に危害を及ぼすような事故が発生して
いる。 For example, in a forklift mast roller bearing, the mast rail on which the outer ring rolls is
Because general mechanical structural steel such as S45C is used, if the entire outer ring is hardened to about H RC 60 like a normal rolling bearing outer ring,
There were disadvantages in that the rail surface was extremely worn, significantly reducing its durability, and the abrasion powder was scattered, significantly deteriorating the working environment. In addition, because the entire outer ring has high hardness, it is easily broken when an impact load or large load is applied.When the outer ring is broken, it breaks into many pieces because the material has no toughness, which can be dangerous for workers. An accident that causes harm has occurred.
このような摩耗および破損の危検を防止するた
めに、第１図に示すように、外輪１に浸炭材を使
用し、外周面部に防浸炭処理を施した後、内周面
及び両端面部に浸炭焼入れにより焼入れ層２を形
成させたものが提供されているが、これは防浸炭
処理が甚だ面倒であつて多くの作業時間と多大の
エネルギーを必要とし、その上材料が高価なため
に著るしくコスト高になる欠点がある。また軸受
外輪としての強度を持たせるには、浸炭深さを充
分に深くする必要があるが、これに要する作業時
間とエネルギーが著るしく多くなり、それでも充
分な浸炭深さを得ることが難かしく、充分な強度
が得られない等の不都合を生じ易い欠点がある。 In order to prevent such risk of wear and breakage, as shown in Figure 1, carburized material is used for the outer ring 1, and after the outer circumferential surface is treated with anti-carburizing treatment, the inner circumferential surface and both end surfaces are coated with carburized material. The hardened layer 2 is formed by carburizing and quenching, but the carburizing prevention treatment is extremely troublesome and requires a lot of work time and energy, and the material is expensive. It has the disadvantage of being expensive and expensive. In addition, in order to provide the strength of the outer ring of the bearing, it is necessary to carburize it to a sufficiently deep depth, but this requires a significant amount of time and energy, and even then it is difficult to obtain a sufficient carburizing depth. However, it has the disadvantage that it tends to cause problems such as not being able to obtain sufficient strength.
この発明は、内外周面のかたさが異なり、かつ
大荷重、高衝撃力に耐えるだけの充分の強度を備
えた例えばマストローラ兼用軸受の外輪等の如き
鋼製環状部品の焼入れにおいて、例えばS55C等
の如き廉価な材料を使用して所要の部分焼入れか
たさを保有し充分の強度を発揮させ、かつ焼入れ
工程を著しく容易ならしめてそのコストを大幅に
低減することを目的とするものである。 This invention is suitable for hardening steel annular parts such as outer rings of mast roller bearings that have different hardness on the inner and outer peripheral surfaces and have sufficient strength to withstand large loads and high impact forces, such as S55C. The purpose of this invention is to maintain the required partial hardening hardness and exhibit sufficient strength using such inexpensive materials, and to greatly simplify the hardening process and significantly reduce the cost.
実施例について説明すれば、第２図に示す如き
焼入れ装置２０は、所定の焼入れ温度に加熱した
鋼製環状部品１０をセツトする。鋼製環状部品１
０は、例えばS55C等の如き廉価な焼入れ可能な
一般構造用鋼材を所要形状（図示はマストレーラ
兼用軸受の外輪）に施削等により形成した後、電
気炉等により所定焼入れ温度に加熱する。 To explain an embodiment, a hardening apparatus 20 as shown in FIG. 2 sets a steel annular part 10 heated to a predetermined hardening temperature. Steel annular part 1
0 is formed by machining an inexpensive hardenable general structural steel material such as S55C into a desired shape (the illustrated outer ring of a bearing that also serves as a mast trailer) is then heated to a predetermined hardening temperature using an electric furnace or the like.
一方、焼入れ装置２０は、鋼製環状部品１０を
外径案内で載設支持する段部２１を備えた回転支
台２２と、回転支台２２の中心を貫通して該支台
２２上の鋼製環状部品１０の内径面に対向する多
数の冷却液噴出孔２３を備えた冷却水路２４と、
冷却水路２４の上端部に着脱可能に装着されて下
向きの周縁部２５を回転支台２２上の鋼製環状部
品１０の上端部に比較的小面積で同心的に密接さ
せる蓋部材２６と、鋼製環状部品１０の外周面に
対し一定の間隔を置いて同心的に対向する多数の
圧縮空気噴出孔２７を備えた環状の圧縮空気噴出
管２８とからなり、回転支台２２の段部２１の内
径縁部２９がそれに載置された鋼製環状部品１０
の下端面に線状に密接して、該縁部２９と、蓋部
材２６の周縁部２５とにより、鋼製環状部品１０
の内外周の空間を内径側空間３０と外径側空間４
０とに明確に仕切る。すなわち回転支台２２と蓋
部材２６とが前記空間を狭い境界域で仕切るため
の仕切り部材である。 On the other hand, the quenching device 20 includes a rotary support 22 having a stepped portion 21 on which the steel annular component 10 is placed and supported by an outer diameter guide, and a rotary support 22 that penetrates through the center of the rotation support 22 and supports the steel annular component 10 on the support 22. a cooling water channel 24 equipped with a large number of cooling liquid ejection holes 23 facing the inner diameter surface of the annular component 10;
A cover member 26 is removably attached to the upper end of the cooling water channel 24 and brings the downward peripheral edge 25 into concentric contact with the upper end of the steel annular component 10 on the rotation support 22 in a relatively small area; It consists of an annular compressed air ejection pipe 28 equipped with a large number of compressed air ejection holes 27 concentrically facing the outer circumferential surface of the annular component 10 at regular intervals, and Steel annular part 10 with inner diameter edge 29 resting on it
The edge 29 and the peripheral edge 25 of the lid member 26 form a linearly close contact with the lower end surface of the steel ring part
The spaces on the inner and outer peripheries of are defined as the inner diameter side space 30 and the outer diameter side space 4
A clear division between 0 and 0. That is, the rotation support 22 and the lid member 26 are partition members for partitioning the space into a narrow boundary area.
而して所定温度に加熱された鋼製環状部品１０
を回転する回転支台２２に載置し、冷却水路２４
の上端に蓋部材２６を取りつけてその周縁部２５
を前記部品１０の上端面に着座させてセツトを完
了する。（回転支台の回転はセツト完了後でもよ
い。）
セツトが完了すれば、冷却水路２４の噴出孔２
３から鋼製環状部品１０の内径面及び仕切り部材
で仕切られた内径側の上下両端面に対し冷却液を
噴射して急冷させ、それと同時に圧縮空気噴出管
２８と噴出孔２７から鋼製環状部品１０の外径面
に対し圧縮空気を噴射して、鋼製環状部品の内径
側を所要の適正かたさに焼入れると共に、外径側
を調質かたさとほぼ同等のかたさに保持させる。 The steel annular part 10 is heated to a predetermined temperature.
is placed on the rotating support 22, and the cooling water channel 24
Attach the lid member 26 to the upper end of the peripheral edge 25
is seated on the upper end surface of the component 10 to complete the setting. (The rotating support may be rotated after the setting is completed.) Once the setting is completed, the
3 to the inner diameter surface of the steel annular component 10 and both upper and lower end surfaces of the inner diameter side partitioned by the partition member to rapidly cool it, and at the same time, the steel annular component is released from the compressed air jet pipe 28 and the jet hole 27. Compressed air is injected onto the outer diameter surface of the steel annular part to harden the inner diameter side of the steel annular part to a required appropriate hardness, and to maintain the outer diameter side at a hardness substantially equivalent to the tempered hardness.
なお、両端部における厚みＴに対する硬化部寸
法t1、t2は、第２図に示すように仕切り部材たる
回転支台２２の段部２１の内径縁部２９の直径
D1および蓋部材２６の周縁部２５の内径D2を適
宜調整することによつて任意に定めることができ
る。 In addition, the hardened part dimensions t1 and t2 with respect to the thickness T at both ends are the diameter of the inner diameter edge 29 of the stepped part 21 of the rotating support 22, which is a partition member, as shown in FIG.
It can be arbitrarily determined by appropriately adjusting D1 and the inner diameter D2 of the peripheral edge 25 of the lid member 26.
上記の例における中心部−線断面における
かたさ分布は、第５図に示す如く軌道側で深さ３
mm程度までHRC60以上のかたさを有し、外径側に
到るに従つてかたさを低下し、屈折点が７mmの位
置にあり、そこから外周面部（この場合環体厚み
を11mmとしたものを示した）までHRC30であつ
た。 The hardness distribution in the center-line cross section in the above example is as shown in Figure 5, at a depth of 3 on the track side.
It has a hardness of H RC 60 or higher up to about 1.5 mm, and the hardness decreases as it approaches the outer diameter, and the bending point is at a position of 7 mm. H RC 30 up to (shown).
なお鋼製環状部品は第３図の形状に限定される
ものではなく、第４図の形状域はその他の形状で
も可能であり、外径側を焼入れして内径側を調質
かたさとほぼ同等のかたさに保持するとか、両端
面部の厚みに対する焼入れ部寸法を任意に設定す
ることも可能である。また、使用材料として、
S55C、S45C等S40C〜S60C程度の範囲内の一般
構造用炭素鋼が使用でき、焼入れ装置２０も第２
図に例示したもの以外の適宜の装置を使用するこ
とができる。 Note that the steel annular part is not limited to the shape shown in Figure 3; other shapes are possible within the range of shapes shown in Figure 4, and the hardness is almost equivalent to hardening the outer diameter side and refining the inner diameter side. It is also possible to maintain the hardness or to arbitrarily set the dimensions of the hardened portion relative to the thickness of both end surfaces. In addition, as materials used,
General structural carbon steel in the range of S40C to S60C such as S55C and S45C can be used, and the quenching device 20 is also
Any suitable device other than that illustrated in the figures may be used.
また冷却液としては、水、油、その他任意の冷
却液を、使用材料、目的のかたさ、焼入れ深さ等
に合わせて適当に選択すればよく、同様に冷却速
度も適宜調整すればよい。 Further, as the cooling fluid, water, oil, or any other cooling fluid may be appropriately selected depending on the material used, the intended hardness, the quenching depth, etc., and the cooling rate may be similarly adjusted as appropriate.
この発明は以上のように、所定の焼入れ温度に
加熱した焼入れ可能な一般構造用鋼材からなる鋼
製環状部品の内外周の空間を、該部品の両端面に
比較的小面積で接する仕切り部材で内径側と外径
側とに明確に仕切り、内径側と外径側の何れか一
方から鋼製環状部品に向つて焼入れ用冷却液を噴
射し、それと同時に他方から圧縮空気を噴射し
て、冷却液を噴射した側の焼入れを行うと同時に
他方の周面を調質かたさとほぼ同等のかたさとす
るので、焼入れ硬化部が、第３図に濃いハツチン
グを付して示す如く、両端部で深く、中心部（
−線）で浅いほぼ曲率半径Ｒの凹形の焼入れ硬
化層となつた鋼製環状部品が得られた。 As described above, the present invention provides a space between the inner and outer peripheries of a steel annular component made of hardenable general structural steel heated to a predetermined hardening temperature using a partition member that contacts both end surfaces of the component in a relatively small area. The inner diameter side and the outer diameter side are clearly partitioned, and the cooling liquid for quenching is injected toward the steel annular part from either the inner diameter side or the outer diameter side, and at the same time compressed air is injected from the other side to cool it. Since the side where the liquid was injected is quenched, the other circumferential surface is made to have almost the same hardness as the refining hardness, so that the quench hardened area is deep at both ends, as shown with dark hatching in Figure 3. ,Central part(
A steel annular part having a shallow concave hardened layer with a radius of curvature R was obtained at the line (- line).
そして該鋼製環状部品は、上記した状態の硬化
層が形成されることにより廉基なS55C等の一般
構造用鋼材を使用するにもかかわらず、従来の浸
炭焼入れを行つたもの、或は高周波焼入れ等によ
る表面硬化処理を行つたものに比べて焼入れ深さ
が充分に深く、例えばマストローラ兼用軸受の外
輪に要求される強度を充分に保持していた。 Although the steel annular parts are made of general structural steel materials such as S55C, which are inexpensive due to the formation of a hardened layer in the above-mentioned state, they cannot be made by conventional carburizing and quenching or by high-frequency heating. The quenching depth was sufficiently deep compared to those subjected to surface hardening treatment such as quenching, and the strength required for, for example, the outer ring of a mast roller bearing was sufficiently maintained.
殊に焼入れ硬化層が第３図の如く曲率半径がほ
ぼＲになる凹形の断面形状を有し、この焼入れ層
が内径層から両端面に向つて連続し均質な焼入れ
層に形成され、両端面部分の焼入れ部寸法が、環
状部品の厚みに対し、中央部より適宜に増大し、
例えば軸受の外輪においてその軌道面の補強効果
が著るしく大となり、その剛性を高め強度が向上
した。しかも、外径側の、調質かたさとほぼ同等
のかたさ部分がじん性を向上して大荷重、高衝撃
力に対する耐力を大幅に向上させ、かつ相手部
材、例えばマストローラの摩耗防止に効果大であ
つた。 In particular, the quenched layer has a concave cross-sectional shape with a radius of curvature of approximately R as shown in Fig. 3, and this quenched layer continues from the inner diameter layer toward both end faces to form a homogeneous hardened layer. The dimensions of the hardened part of the face part increase appropriately from the center part with respect to the thickness of the annular part,
For example, the reinforcing effect on the raceway surface of the outer ring of a bearing has been significantly increased, increasing its rigidity and strength. Moreover, the hardness of the outer diameter portion, which is almost equivalent to the tempered hardness, improves toughness and greatly improves resistance to large loads and high impact forces, and is highly effective in preventing wear of mating parts, such as mast rollers. It was hot.
さらに本発明は内径側と外径側の何れか一方か
ら鋼製環状部品に向つて焼入れ用冷却液を噴射
し、それと同時に他方から圧縮空気を噴射して、
冷却液を噴射した側の焼入れを行うと同時に他方
の周面を調質かたさとほぼ同等のかたさとするの
で、焼入れ工程は１回でよく、工程管理が容易で
あり、均質な製品を連続して製造することが容易
となつた。 Furthermore, the present invention injects a cooling liquid for quenching toward the steel annular component from either the inner diameter side or the outer diameter side, and at the same time injects compressed air from the other side.
Since the side on which the coolant is injected is hardened and the other peripheral surface is made to have almost the same hardness as the refining hardness, the hardening process only needs to be done once, making process control easy and allowing continuous production of homogeneous products. It has become easier to manufacture.
第１図は従来の鋼製環状部品の断面図、第２図
はこの発明を実施するための装置の一例を示す
図、第３図、第４図はこの発明に係る鋼製環状部
品を例示する断面図、第５図はかたさ分布を示す
図である。
１０……鋼製環状部品、２０……焼入れ装置、
２２……回転支台（仕切り部材）、２４……冷却
水路、２６……蓋部材（仕切り部材）、２８……
圧縮空気噴出管、３０……内径側空間、４０……
外径側空間。
FIG. 1 is a sectional view of a conventional steel annular component, FIG. 2 is a diagram showing an example of an apparatus for carrying out the present invention, and FIGS. 3 and 4 are illustrations of a steel annular component according to the present invention. FIG. 5 is a cross-sectional view showing the hardness distribution. 10... Steel annular part, 20... Quenching device,
22... Rotating support (partition member), 24... Cooling water channel, 26... Lid member (partition member), 28...
Compressed air jet pipe, 30... Inner diameter side space, 40...
Outer diameter side space.
Claims (1)
般構造用鋼材からなる鋼製環状部品の内外周の空
間を、該部品の両端面に比較的小面積で接する仕
切り部材で内径側と外径側とを狭い境界域で仕切
り、内径側と外径側の何れか一方から鋼製環状部
品に向つて焼入れ用冷却液を噴射し、それと同時
に他方から圧縮空気を噴射して、冷却液を噴射し
た側の焼入れを行うと同時に他方の周面を調質か
たさとほぼ同等のかたさとすることを特徴とする
鋼製環状部品の部分焼入れ方法。 ２ 仕切り部材の直径を調整して鋼製焼入れ部品
の両端面の焼入れ範囲を調整することを特徴とす
る特許請求の範囲第１項記載の鋼製環状部品の部
分焼入れ方法。 ３ 冷却液を鋼製環状部品の内径側から噴射する
と同時に圧縮空気を外周面に噴射することを特徴
とする特許請求の範囲第１項又は第２項記載の鋼
製環状部品の部分焼入れ方法。[Scope of Claims] 1. A space on the inner and outer periphery of a steel annular component made of hardenable general structural steel heated to a predetermined hardening temperature is divided by a partition member that contacts both end faces of the component in a relatively small area. The side and the outer diameter side are separated by a narrow boundary area, and a cooling liquid for quenching is injected toward the steel annular part from either the inner diameter side or the outer diameter side, and at the same time, compressed air is injected from the other side. A method for partially quenching a steel annular part, characterized by quenching the side to which a cooling liquid has been injected, and at the same time making the other circumferential surface almost as hard as the tempered hardness. 2. The method for partially quenching a steel annular component according to claim 1, which comprises adjusting the diameter of the partition member to adjust the quenching range of both end faces of the steel quenched component. 3. A method for partially quenching a steel annular component according to claim 1 or 2, characterized in that compressed air is injected onto the outer circumferential surface of the steel annular component at the same time as the cooling liquid is injected from the inner diameter side of the steel annular component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6014681A JPS57174415A (en) | 1981-04-21 | 1981-04-21 | Partial hardening method of steel ring parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6014681A JPS57174415A (en) | 1981-04-21 | 1981-04-21 | Partial hardening method of steel ring parts |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19819185A Division JPS61235509A (en) | 1985-09-07 | 1985-09-07 | Partial hardening device for annular steel parts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57174415A JPS57174415A (en) | 1982-10-27 |
| JPH0253491B2 true JPH0253491B2 (en) | 1990-11-16 |
Family
ID=13133709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6014681A Granted JPS57174415A (en) | 1981-04-21 | 1981-04-21 | Partial hardening method of steel ring parts |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57174415A (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58110619A (en) * | 1981-12-24 | 1983-07-01 | Osaka Bearing Seizo Kk | Partial hardening method for annular steel parts |
| DE3229707A1 (en) * | 1982-08-10 | 1984-02-16 | Skf Kugellagerfabriken Gmbh, 8720 Schweinfurt | Method of producing a rolling-bearing unit |
| NL1006539C2 (en) * | 1997-07-10 | 1999-01-12 | Skf Ind Trading & Dev | Method for performing a heat treatment on metal rings, and bearing ring thus obtained. |
| US20030127161A1 (en) * | 2002-01-09 | 2003-07-10 | The Timken Company | Process for hardening a circumferential surface on a steel article |
| KR100781188B1 (en) | 2006-06-23 | 2007-11-30 | 삼영기계(주) | Heating processing method for surface of piston ring and a piston ring |
| JP5433932B2 (en) * | 2007-06-19 | 2014-03-05 | 日本精工株式会社 | Annular deformation correction method |
| US10029855B2 (en) | 2016-09-23 | 2018-07-24 | Rockwell Automation Technologies, Inc. | Multi-rail/roller compliance system for independent mover products |
-
1981
- 1981-04-21 JP JP6014681A patent/JPS57174415A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57174415A (en) | 1982-10-27 |
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